[ft] face->ascender always has the same height

[Olumide]

Dear List,

I've written a bit of code to rasterizing fonts at any arbitrary size as 
follows:

#define FONT_HEIGHT 18

FT_Size_RequestRec req = { FT_SIZE_REQUEST_TYPE_BBOX , 0 , FONT_HEIGHT * 
64 , 0 , 0 };
CHECK_STATUS( error , "Request size rec" )

FT_Request_Size( face , &req );
CHECK_STATUS( error , "Request size" )

Oddly, face->ascender always has the same height. Why is this the case? 
I need the ascender in order to locate my rasterized font in the 
requested box (of max size FONT_HEIGHT).

Regards,

- Olumide